# FM4063

**Shenzhen Fuman** · Battery Management · ESOP-8

FM4063 from Shenzhen Fuman, in a ESOP-8. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | NC | unconnected | Listed in the pin table as an empty pin (空脚) with no function, so it is not connected. |
| 2 | PROG | passive | Sets charge current through a 1% resistor from PROG to GND (IBAT = 1200/RPROG); PROG is held at 1 V in constant-current mode, and charge current is 0 if no resistor is fitted. |
| 3 | GND | power_in | Power ground for the charger. |
| 4 | VCC | power_in | Positive input supply operating from 4.5 V to 5.5 V, to be bypassed with at least 1 µF (22 µF where the input supply may be shorted); input over-voltage protection trips above about 6.0 V typ., and the absolute maximum rating is 30 V. |
| 5 | BAT | power_out | Charge current output to the battery that regulates the float voltage to 4.25 V (stated accuracy ±1%); the internal resistor divider that sets float voltage is disconnected in shutdown mode. |
| 6 | CHRGT | output | Open-drain full-charge indicator that is pulled low by an internal switch when charging is complete and is high-impedance otherwise, so an external pull-up is needed for MCU sensing. |
| 7 | CHRG | output | Open-drain charge-status indicator that is pulled low while charging and is high-impedance otherwise; it can sink up to 10 mA and needs an external pull-up for MCU sensing. |
| 8 | NC | unconnected | Listed in the pin table as an empty pin (空脚) with no function, so it is not connected. |
| 9 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Shenzhen Fuman |
| Package | ESOP-8 |
| Category | Power Management (PMIC) |
| Pins | 9 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| 输入电源电压 (VCC) recommended operating supply | VCC | 4.5 | 5 | 5.5 | V |  | 3 |
| VFLOAT 输出（浮充）电压 float voltage (all shipment bins A/B/C) | VFLOAT | 4.16 | 4.24 | 4.35 | V | 0℃≤TA≤85℃ | 3 |
| IBAT BAT 端电流, RPROG=1.2k (1000mA setting) | IBAT | 900 | 1000 | 1100 | mA | RPROG =1.2k,VBAT=3.7，电流模式 | 3 |
| IBAT BAT 端电流, RPROG=12k (100mA setting) | IBAT | 90 | 100 | 110 | mA | RPROG =12k,VBAT=3.7V，电流模式 | 3 |
| Vcc 过压保护阈值 OVP threshold | Vcc_ovp | 5.6 | 6 | 6.3 | V | Vbat=3.7V，Vcc 上升时测试 | 3 |
| VCC-VBAT阈值电压 (VCC 从低到高) | VASD | 60 | 100 | 140 | mV | VCC 从低到高 | 3 |
| VCC-VBAT阈值电压 (VCC 从高到低) | VASD | 5 | 40 | 50 | mV | VCC 从高到低 | 3 |
| ITERM C/10 终止电流阈值 | ITERM | 8 |  | 25 | mA | RPROG=12K | 3 |
| ΔVRECHRG 再充电电池门限电压 (VFLOAT - VRECHRG) | ΔVRECHRG | 100 | 150 | 200 | mV | VFLOAT - VRECHRG | 3 |
| VUV VCC欠压锁定阈值 (VCC 从低到高) | VUV | 3.5 | 3.7 | 3.9 | V | VCC 从低到高 | 3 |
| VUVHYS VCC欠压锁定滞后 | VUVHYS | 150 | 200 | 300 | mV |  | 3 |
| VTRIKL 涓流充电阈值电压 | VTRIKL | 2.9 | 3 | 3.1 | V | RPROG=12k，VBAT 上升 | 3 |
| tRECHARGE 再充电比较器滤波时间 (VBAT 高至低) | tRECHARGE | 0.8 | 1.8 | 4 | ms | VBAT 高至低 | 3 |
| tTERM 终止比较器滤波时间 (IBAT 降至 ICHG/10 以下) | tTERM | 0.8 | 1.8 | 4 | ms | IBAT 降至 ICHG/10 以下 | 3 |
| ICC 输入电源电流 充电模式 | ICC | 150 |  | 500 | µA | 充电模式（3），RPROG=10K | 3 |
| ICC 输入电源电流 待机模式（充电终止） | ICC | 70 |  | 100 | µA | 待机模式（充电终止） | 3 |
| ICC 输入电源电流 关断模式 | ICC | 55 |  | 100 | µA | 关断模式（RPROG未连接，VCC﹤VBAT，VCC﹤VUV） | 3 |
| IBAT BAT 端电流 待机模式 | IBAT | -5 | 1 | 5 | µA | VBAT=4.2V，待机模式 | 3 |
| IBAT BAT 端电流 关断模式 | IBAT | -5 | 0.5 | 5 | µA | 关断模式, RPROG未连接,VCC=3V | 3 |
| IBAT BAT 端电流 休眠模式 | IBAT |  | 1 |  | µA | 休眠模式，VCC=0V | 3 |
| ITRIKL 涓流充电电流 | ITRIKL | 8 |  | 30 | mA | VBAT﹤VTRIKL，RPROG = 120k | 3 |
| RON 功率 FET 导通电阻 (VCC 与 BAT 之间) | RON |  | 650 |  | mΩ |  | 3 |
| tss 软启动时间 (IBAT=0 至 IBAT=1000mA) | tss |  | 20 |  | μs | IBAT=0 至 IBAT=1000mA | 3 |
| TLIM 限定温度模式中的结温 | TLIM |  | 145 |  | ℃ |  | 3 |
| Vcc 过压保护迟滞 OVP hysteresis (Vcc 下降时测试) |  |  | 0.3 |  | V | Vbat=3.7V，Vcc 下降时测试 | 3 |
| 热限制 thermal foldback onset (约) |  |  | 120 |  | ℃ | 芯片温度升至约120℃的预设值以上，内部热反馈减小设定充电电流 | 5 |
| 绝对最大额定值 输入电源电压 VCC | VCC | -0.3 |  | 30 | V |  | 1 |
| 绝对最大额定值 CHRGT/CHRG 引脚电压 |  | -0.3 |  | 9 | V |  | 1 |
| 绝对最大额定值 BAT 引脚电压 |  | -4.3 |  | 7 | V |  | 1 |
| 绝对最大额定值 BAT 引脚电流 |  |  |  | 1200 | mA |  | 1 |
| 绝对最大额定值 最大结温 |  |  |  | 145 | ℃ |  | 1 |
| 工作环境温度范围 operating ambient temperature |  | -40 |  | 85 | ℃ |  | 1 |
| 贮存温度范围 storage temperature |  | -65 |  | 125 | ℃ |  | 1 |
| 引脚温度 lead temperature (soldering) |  |  |  | 260 | ℃ | 焊接时间 10 秒 | 1 |

## CAD (KiCad official)

- Symbol: `FM4063`
- Footprint: `Package_SO:SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.41x3.3mm`
- 3D model: ESOP-8 (KiCad packages3D, STEP)
- 3D model files: `fm4063-etched.step` / `fm4063-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `fm4063.step` / `fm4063.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [Shenzhen Fuman datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603502781370691584) (7 pp, sha256 `45d26de5971df1f0`, retrieved 2026-10-18, tier: lcsc)
- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-5-5` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/fm4063-datasheet.pdf)